I was pretty late to raiding, only completed vog three times though I had numerous partial attempts before those, and I'm right around twenty or so crota completions, I forget the exact number but close. However, in crota, I've managed three songs, three black hammers, two hungers, about four or five oversouls, four abyss defiant, four words, and finally, last night, my first fang. But for all of my very good luck, I've also managed three helmets for my two hunters, I have never seen sword breaker or light in the abyss drop. I've even gotten several exotics, but not those two raid weapons. Eventually, and in the meantime I need gear for my warlock anyway.